JPS58142453A - Data processing device - Google Patents

Abstract

PURPOSE:To attain the program diagnosis without providing a means storing a diagnostic program in a control memory, by using the constitution of a multiplexed processing device and storing the diagnostic microprogram with the other processing device. CONSTITUTION:A duplicated data processing device is constituted with a device 11 to be diagnosed and a diagnostic device 12 and an instruction executing sequence and a microprogram word are stored in a control memory 4 of the device 11. The address of this memory 4 is accessed with the content of a control memory address register 3 and the normal processing is executed with an operator 110. Data and a diagnostic indicating signal from the device 12 are applied to a switching circuit 5 of the device 11, and the data is stored in a microinstruction register 6 via the circuit 5. A gate control line 8 is controlled with the information stored in the register 6, the output operates each circuit of the device 12 and the program diagnosis is executed without storing the diagnostic program to the memory 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention J] The present invention is a micro-program controlled multiplexed data processor] 1! This relates to the diagnostic method in the equipment field. [Technical Background of the Invention and W141i Points] Generally, online real-time processing devices have a multiplexed configuration such as active and backup duplication in order to maintain continuity of service, and failures may occur. It is designed so that it can be switched to the backup machine when the machine is in use. In this manner, since one device in a multiplexed configuration is normal, by diagnosing the faulty device from the normal device, it is possible to determine the location of the faulty device. In the past, various diagnostic methods have been proposed for online devices with this type of configuration, but one of them is a method in which the devices in both prefectures perform the same operation, that is, run the same diagnostic program and obtain the execution results. There is a method of checking whether they match, finding out what kind of program operations can be executed normally or what kind of processing is being executed incorrectly, and thereby identifying the location of the failure. This is lI of both prefectures! It has a circuit to brighten the execution result of I, and uses it. This method checks execution at the program level, whereas llAl1, which uses a microprogram control method as one of its methods, can check the execution at the microprogram level. Since the microprogram can independently specify the operation of various circuits inside the processing device, it is possible to perform more detailed and efficient checks. However, the microprograms prepared inside the device are for executing program instructions, and microprograms that are efficient for diagnosis are usually not stored. To this end, there is generally a means of replacing the diagnostic microprogram with a microprogram for processing normal program instructions;
That is, a means for writing and replacing the control memory storing the microprogram is provided, thereby making it possible to execute the diagnostic microinstruction. For this reason, a rewritable memory is generally required as the control memory, and therefore, after the power is turned off, it is necessary to reset the microprogram in the control memory. A means for storing microprograms in control memory is provided. For example, a 7-address generation circuit, an address control circuit, an access control circuit, etc. for accessing the external storage device, a data register, a write address control circuit, a timing circuit, etc. for writing to the control memory are required. However, is it okay to have such hardware only for diagnostic purposes? Not 111. Furthermore, it is generally not necessary to rewrite the microprogram word G for executing program instructions during operation of the processing system (rather, from the viewpoint of reliability, a fixed memory that cannot be rewritten is preferable). [Objective of the Invention] Therefore, the object of the present invention is as described above (7) to easily diagnose a microprogram without providing a means for storing a microprogram from an external storage device to a control memory and without providing a rewritable control memory. [Key Point 1 of the Invention] In order to achieve the above object, the present invention utilizes the inside of a multiplexed processing device to run a diagnostic microprogram. The storage is performed by another process eat.The other is the need to make the entire control memory rewritable.
Instead, the part that executes the program instructions should be an identified memory, and for the diagnostic micro program there should be at least 11g of memory.For example, if it is possible to write only to the micro program instruction word register. good. Also, if multiple words are required, a rewritable control memory with a minority of words dedicated to diagnosis can be added, and the control memory that stores micro programs for general instruction processing can be rewritten. It doesn't have to be possible. This can also be said from the following. Diagnosis must be performed quickly after a failure occurs, but it does not need to be performed at such high speed; for example, a processing time of several tens of seconds or several minutes is sufficient. This is more than enough time for a data processing device in which the processing of a program command word is around 1 μs or less, and therefore, it is not an essential condition to improve the execution speed when executing a diagnosis. As mentioned above, the diagnostic microphone 0 is about 1R at a time.
- Diagnosis time is extended because only program instructions can be executed! It can be said that it is an appropriate method to achieve this without becoming a 11-year-old noodle. Therefore, in the present invention, means for forcibly storing one's own microprogram instruction in the microprogram instruction storage register of the other party and means for storing diagnostic data in a register in the other party's data processing device are provided. The micro-program instructions from the device are executed on the IPi device to be diagnosed, and any detailed operations of the device to be diagnosed are diagnosed. [11th Embodiment] The contents of the present invention will be explained in detail below with reference to illustrated embodiments. In FIG. 1, reference numerals 11 and 12 designate duplex processors, both of which are microprogram-controlled processors with the same function. For convenience, processing unit @i
Assuming that i is on the side of the device to be diagnosed and the processing device 12 is on the side of the diagnostic device, only the internal part III of the processing device 11 will be shown in detail. A micro program word indicating the instruction execution sequence and internal information is stored in the control memory CM4, and for normal instruction execution, after the program instruction word is stored in the instruction register IR1, the address generation circuit 2 generates the corresponding instruction. Generate the start address of the processing micro program routine, store it in the control memory address register CAR3, access the specified address in the control memory CM40 with its contents, and store the access result in the microinstruction register MIR.
6, and depending on the contents, gate control lines 8 to each circuit in the processing device are operated to perform the intended processing. Thereafter, the contents of the control memory address register CAR3 are generally made available to the address generating circuit 2, but in some cases the contents of the microinstruction register MIR
Using some branch information of the microinstructions in 6, signal line 7
The above operation is executed continuously while changing the next microinstruction address through the microinstruction, and the target processing is performed. The above is the processing at the time of general program execution, but for the processing at the time of diagnosis, the control line 13 and data line 14 are connected from the diagnostic device [f12 side to the diagnosed IPi device 11, Memory CM4 and microinstruction register M
A switching circuit 5 (selector) is provided between JR6. That is, at the time of diagnosis, the diagnosis instruction signal 10 is decoded by the decoder 15, and the data information of 9 is sent from the switching circuit 5 to the microinstruction register MIR6 via the data 4914 from the diagnostic device 12 instead of the data from the control memory CM4. Stored. With that information, gate control line 8
is controlled, and as a result, each knee circuit of the device to be diagnosed 11 operates based on information from the diagnostic device 12. Here, it is conceivable that the data information 9 is connected to an internal bus for calculation results, but is not particularly limited to this. In addition, the diagnosis instruction signal 1G is sent to the decoder '''J: 'Q
Y D −F 8 tL・? (' ＊ ＊ V 9
19 Diagnostic data can be given to register 120 etc. outside of LMIR6. Here, diagnosis instruction signal 1
Although it is considered that 0 is given as one of the micro fields, it is not particularly limited to this. The diagnostic operation will be explained in more detail. In the arithmetic processing unit, the register group 100 and the register 120 are operated by the arithmetic unit 110, and the result is stored in the register 1.
20 or register group 100 is generally performed. Note that input data to the arithmetic processing section is temporarily stored in the register 120. These operations are controlled by gate 1.
It is controlled by I8 according to the specifications on the micro program instruction unit. These arithmetic processing units also have a diagnostic device @12 as well as the device to be diagnosed 11. On the other hand, for diagnosis, data in the register 12G, for example, is sent to the diagnostic device 12 via the transmission circuit 130. In the diagnostic device 1112, the signal is received by the register 240 corresponding to the receiving register 14G. This register 240 is connected to a switching circuit 201 corresponding to the switching circuit (selector) 101. These are just examples, and the output of the switching circuit 101 may be used instead of the register 12G. In the diagnostic operation, as described above, the diagnostic data is transferred from the diagnostic device 212 to a register in the device to be diagnosed 111, for example, a register.
120, the diagnostic microprogram is caused to perform a desired arithmetic operation using the microinstruction register MIR6, and the result of the arithmetic operation is taken into the receiving register 240 via the transmitting circuit 130. Thereafter, the diagnostic device 112 compares the diagnostic results stored in the reception register 240 with the correct data held by the diagnostic program to determine whether the system has operated correctly and diagnose the defective location. possible. In the embodiment, a case has been shown in which data from the diagnostic device is set in the micro program instruction storage register of the device to be diagnosed, but as described above, it is also possible to set the data in the control memory that can be used for diagnosis. Furthermore, the present invention can be further extended to use other data processing devices as micro program storage means in the case where the entire control memory is a rewritable memory. In this case, not only diagnosis but also initial settings,
It is also effective as a means for rising. Further, in this description, a data processing device with a duplex configuration has been described, but even a case where the data processing device is multiplexed, such as triplexing, can be realized by increasing the number of interfaces between such devices. [Effects of the Invention] As is clear from the above description, according to the present invention, arbitrary microprogram instructions suitable for diagnosis can be set from the other device. , but it can be realized with a simpler circuit configuration. Furthermore, it has become possible to set data on the other device through micro program instructions, and to read data, it has become possible to specify five points using micro program instructions. As is clear from the above description, in the multiplexed data processing apparatus according to the present invention, each of the
device, and does not require dedicated diagnostic equipment. Further, it has the effect of reducing the amount of hardware required for diagnosis.

BRIEF DESCRIPTION OF THE DRAWINGS The figure is a block diagram showing an embodiment of the present invention. 3... Control memory address register 4.
... Control memory 5 ... Switching circuit (selector) 6 ... Micro instruction register 11 ... Device to be diagnosed 12 ... Diagnosis device 13 ... Control line 14 ... Data ring 100 ... Register group 110 ... Arithmetic unit 120 ... Registers 140, 240 ... ...Reception register 130.23
0...Transmission circuit (7317) Representative patent attorney Kensuke Norichika (1 person)
Rotation

Claims (1)

[Claims] Data processing that uses a micro-program control method] In a device multiplexing system, an information transmission path is provided between the multiplexed data processing devices, and each connected data processing device is connected via the information transmission path. and means for transmitting microprogram commands to the partner device, means for transmitting diagnostic data to the partner device, control means for causing the partner device to execute the microprogram commands, and means for reading the execution results of the partner device. A data processing device characterized by: